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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef MessagePort_h
#define MessagePort_h
#include "bindings/v8/ScriptWrappable.h"
#include "core/dom/ActiveDOMObject.h"
#include "core/events/EventListener.h"
#include "core/events/EventTarget.h"
#include "public/platform/WebMessagePortChannel.h"
#include "public/platform/WebMessagePortChannelClient.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
#include "wtf/WeakPtr.h"
namespace WebCore {
class Event;
class ExceptionState;
class Frame;
class MessagePort;
class ExecutionContext;
class SerializedScriptValue;
// The overwhelmingly common case is sending a single port, so handle that efficiently with an inline buffer of size 1.
typedef Vector<RefPtr<MessagePort>, 1> MessagePortArray;
// Not to be confused with blink::WebMessagePortChannelArray; this one uses Vector and OwnPtr instead of WebVector and raw pointers.
typedef Vector<OwnPtr<blink::WebMessagePortChannel>, 1> MessagePortChannelArray;
class MessagePort : public RefCounted<MessagePort>
, public ActiveDOMObject
, public EventTargetWithInlineData
, public ScriptWrappable
, public blink::WebMessagePortChannelClient {
REFCOUNTED_EVENT_TARGET(MessagePort);
public:
static PassRefPtr<MessagePort> create(ExecutionContext&);
virtual ~MessagePort();
void postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionState&);
void start();
void close();
void entangle(PassOwnPtr<blink::WebMessagePortChannel>);
PassOwnPtr<blink::WebMessagePortChannel> disentangle();
// Returns 0 if there is an exception, or if the passed-in array is 0/empty.
static PassOwnPtr<MessagePortChannelArray> disentanglePorts(const MessagePortArray*, ExceptionState&);
// Returns 0 if the passed array is 0/empty.
static PassOwnPtr<MessagePortArray> entanglePorts(ExecutionContext&, PassOwnPtr<MessagePortChannelArray>);
bool started() const { return m_started; }
virtual const AtomicString& interfaceName() const OVERRIDE;
virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
MessagePort* toMessagePort() OVERRIDE { return this; }
// ActiveDOMObject implementation.
virtual bool hasPendingActivity() const OVERRIDE;
virtual void stop() OVERRIDE { close(); }
void setOnmessage(PassRefPtr<EventListener> listener, DOMWrapperWorld* world)
{
setAttributeEventListener(EventTypeNames::message, listener, world);
start();
}
EventListener* onmessage(DOMWrapperWorld* world) { return getAttributeEventListener(EventTypeNames::message, world); }
// A port starts out its life entangled, and remains entangled until it is closed or is cloned.
bool isEntangled() const { return !m_closed && !isNeutered(); }
// A port gets neutered when it is transferred to a new owner via postMessage().
bool isNeutered() const { return !m_entangledChannel; }
private:
explicit MessagePort(ExecutionContext&);
// WebMessagePortChannelClient implementation.
virtual void messageAvailable() OVERRIDE;
void dispatchMessages();
OwnPtr<blink::WebMessagePortChannel> m_entangledChannel;
bool m_started;
bool m_closed;
WeakPtrFactory<MessagePort> m_weakFactory;
};
} // namespace WebCore
#endif // MessagePort_h
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